`doubledayoffice.com`

DNSSEC	⚠️ Not signed
A	205.216.10.18^{🇺🇸 AS397076205.216.10.0/23 4400 Alliance Gateway Fwy Fort Worth TX 76177 United States}
		PTR	`eciredfalcon.com`
		PTR	`www.eciredfalcon.com`
NS	`ns1.digitalspaceportal.net` ⭐
		A	66.175.41.73^{🇨🇦 INFB66.175.0.0/18 619A Kumpf Drive Waterloo ON N2V 1K8 Canada}
			PTR	`ns1c45.carrierzone.com`
NS	`ns2.digitalspaceportal.net`
		A	209.235.143.99^{🇨🇦 INFB209.235.128.0/20 619A Kumpf Drive Waterloo ON N2V 1K8 Canada}
			PTR	`ns2c45.carrierzone.com`
MX	`doubledayoffice-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c902::7^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj0pr02cu00107.inbound.protection.outlook.com`
		A	2a01:111:f403:c946::6^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-ch5pr02cu00406.inbound.protection.outlook.com`
		A	2a01:111:f403:c946::7^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-ch5pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:f90f::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr04cu00100.inbound.protection.outlook.com`
		A	52.101.9.5^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mn2pr04cu00205.inbound.protection.outlook.com`
		A	52.101.10.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn8pr05cu00102.inbound.protection.outlook.com`
		A	52.101.11.19^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sa9pr04cu00203.inbound.protection.outlook.com`
		A	52.101.41.6^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj0pr03cu01406.inbound.protection.outlook.com`
TXT	`_i6ry7g8kir4r1kcinlst7yzko3b4aen`
TXT	`v=spf1 include:spf.protection.outlook.com include:mail.redcheetah.com -all`
SOA	`ns1.digitalspaceportal.net`postmaster@carrierzone.com 2025-08-15 #10

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774443967

Subdomains

mail.doubledayoffice.com

Same first word

doubledayoffice.com

DNS History

18 records (4 active, 14 former)

○NSdns.britsys.net2016-11-26 → 2017-08-27 · 5 obs

○ 2015-08-26 19:37:18
● 2016-11-26 22:54:56
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○NSdns1.britsys.net2016-11-26 → 2017-08-27 · 5 obs

○ 2015-08-26 19:37:18
● 2016-11-26 22:54:56
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○NSdns2.britsys.net2016-11-26 → 2017-08-27 · 5 obs

○ 2015-08-26 19:37:18
● 2016-11-26 22:54:56
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○NSns1.aerioconnect.net2016-11-26 → 2017-03-23 · 5 obs

○ 2015-08-26 19:37:18
● 2016-11-26 22:54:56
● 2017-03-23 13:08:50
○ 2017-08-17 21:21:00
○ 2026-03-25 13:17:50

●NSns1.digitalspaceportal.net2026-03-17 → 2026-03-25 · 3 obs

○ 2017-08-27 10:33:46
● 2026-03-17 17:33:54
● 2026-03-25 13:17:50

○NSns10.britsys.net2015-08-26 → 2017-08-27 · 6 obs

● 2015-08-26 19:37:18
● 2017-03-23 13:08:50
○ 2017-08-17 21:21:00
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○NSns2.aerioconnect.net2016-11-26 → 2017-03-23 · 5 obs

○ 2015-08-26 19:37:18
● 2016-11-26 22:54:56
● 2017-03-23 13:08:50
○ 2017-08-17 21:21:00
○ 2026-03-25 13:17:50

●NSns2.digitalspaceportal.net2026-03-17 → 2026-03-25 · 3 obs

○ 2017-08-27 10:33:46
● 2026-03-17 17:33:54
● 2026-03-25 13:17:50

○NSns20.britsys.net2015-08-26 → 2017-03-23 · 4 obs

● 2015-08-26 19:37:18
● 2017-03-23 13:08:50
○ 2017-08-17 21:21:00
○ 2026-03-25 13:17:50

●MXdoubledayoffice-com.mail.protection.outlook.com2026-03-17 → 2026-03-25 · 3 obs

○ 2017-08-27 10:33:46
● 2026-03-17 17:33:54
● 2026-03-25 13:17:50

○MXmail.doubledayoffice.com2015-08-26 → 2015-08-26 · 3 obs

● 2015-08-26 19:37:18
○ 2015-09-17 06:32:38
○ 2026-03-25 13:17:50

○MXsf-0.mx.aerioconnect.net2015-08-26 → 2017-08-27 · 4 obs

● 2015-08-26 19:37:18
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○MXsf-slave1.mx.aerioconnect.net2015-08-26 → 2017-08-27 · 4 obs

● 2015-08-26 19:37:18
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○MXsf-slave2.mx.aerioconnect.net2015-09-17 → 2017-08-27 · 5 obs

○ 2015-08-26 19:37:18
● 2015-09-17 06:32:38
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

●A205.216.10.182026-03-17 → 2026-03-25 · 3 obs

○ 2017-08-27 10:33:46
● 2026-03-17 17:33:54
● 2026-03-25 13:17:50

○A206.152.128.2252017-08-17 → 2017-08-27 · 5 obs

○ 2017-03-23 13:08:50
● 2017-08-17 21:21:00
● 2017-08-27 10:33:46
○ 2026-03-17 17:33:54
○ 2026-03-25 13:17:50

○A208.123.88.1252016-01-08 → 2017-03-23 · 5 obs

○ 2015-12-19 00:19:48
● 2016-01-08 07:09:44
● 2017-03-23 13:08:50
○ 2017-08-17 21:21:00
○ 2026-03-25 13:17:50

○A69.26.129.22015-08-26 → 2015-12-19 · 4 obs

● 2015-08-26 19:37:18
● 2015-12-19 00:19:48
○ 2016-01-08 07:09:44
○ 2026-03-25 13:17:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, f.gtld-servers.net, b.gtld-servers.net, j.gtld-servers.net...	-
doubledayoffice.com	ns1.digitalspaceportal.net, ns2.digitalspaceportal.net	-

✅ Authoritative Response

Server:66.175.41.73

NS records: ns1.digitalspaceportal.net, ns2.digitalspaceportal.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for doubledayoffice.com (unsigned zone)

⏱️ Timing

Total: 451ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`205.216.10.18`
NS	2	`ns2.digitalspaceportal.net, ns1.digitalspaceportal.net`
MX	1	`doubledayoffice-com.mail.protection.outl`
TXT	2	`_i6ry7g8kir4r1kcinlst7yzko3b4aen, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.digitalspaceportal.net postmaster.ca`

Analysis

Hierarchy

doubledayoffice.com is the parent of mail.doubledayoffice.com.

IP Addresses

doubledayoffice.com resolves to one IP number: 205.216.10.18.

other host names including osbornpaper.com, nsofficesupplies.com, eciredfalcon.com, onyximaging.com and southernbusinesssupply.com share IP numbers with doubledayoffice.com.

Name Servers

doubledayoffice.com is delegated to two name servers ns1.digitalspaceportal.net and ns2.digitalspaceportal.net.

doubledayoffice.com shares the same name server setup as other domains, for instance villarreals.net, dmidco.com, nakhlaengineers.com, michcorvette.org and unitedmedicalsolutions.org.

doubledayoffice.com at least partially shares name servers with other domains, for instance ndhmaa.com, susanofburlingame.com, jhcowan.com, koraleen.com and blowmoldservices.com.

these name servers are often used together with ns1.att-websites.com, ns2.att-websites.com, ns1.att-websitehosting.com and ns2.att-websitehosting.com.

Host names with one IP number:

ns1.digitalspaceportal.net points to 66.175.41.73

ns2.digitalspaceportal.net points to 209.235.143.99

Mail Servers

doubledayoffice.com is handled by a single mail server, doubledayoffice-com.mail.protection.outlook.com.

Host doubledayoffice-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c902::7, 2a01:111:f403:c946::6, 2a01:111:f403:c946::7, 2a01:111:f403:f90f::, 52.101.9.5, 52.101.10.10, 52.101.11.19 and 52.101.41.6.

doubledayoffice.com - robtex.com